Spool for adhesive tape



Feb., 2, 1932, A J.' H. KJELLs-rRoM 1,843,235

SPOOL FOR ADHESIVE TPE Filed sepf. 18. 1930 JOHN H. EJELLSTRGH, F ROCMORD, ILLHOIS, ASSIGNOB TO 3'. L. CLERK MANUFAC- TUBING CG., 0F BOCKFORD, ILLBTOES, A COBPOBATEON 0F ELLINOIVS sroor. son snnfnsrvn rara .application mea september 1e, wao. serial no; eeaeae.

rllhe invention relates to improvements in spools especially designed as containers for adhesive tape, and has more especial reference to a spool in which the heads are adapted to be applied to opposite ends of a tubular body after a roll of adhesive tape has been applied to the body.

The object of the invention is to provide an improved construction for the spool facilitating the application of the heads to the ends of a tubular body forming a metallic core for the spool, and insuring a firm connection therewith andv free from' sharp or rough edges.

Affurther object is to provide a spool ci the character referred to which is capable of economical manufacture. i

In the accompanying drawings l have illustrated a preferred embodiment of the invention. Gf these drawings:

Figure l is a central longitudinal sectional view through the heads and body of the spool, the latter forming the core oi? aroll ot' adhesive plaster and one of the heads being shown 1n position before assembly with the body.

Fig. 2 is an end elevational vievv oli one ci I the heads.

Fig. 3 is a View similar to Fig. l but showinganother embodiment of the invention.

ig. 4 is a central sectional view of a spool combined with a container for enclosing the same.

Referring rst to Fig. l, my improved spool comprises a tubular body 5 constituting a core for a roll 6 of adhesive plaster. The core is formed from a dat sheet of metal bent rinto tubular form, with its opposite edges meeting in a butt joint .-7. rlhe ends of the body or core are provided with inturned curls 8 and preferably the end edges o the sheet from Which'the body is formed are serrated as indicated at 9 to facilitate the inwardly' curling thereof. It 'will be observed that the curls 8, thus formed, provide relatively large annular shoulder portions of substantially circular cross section terminatinr just Within the ends of the roll 6 of adhesive tape, the latter being of a width substantially equal to Vthe Width of the core.

In the construction shown in said Fig. 1, an end-member in the-form of a head 10 is applied to .each end of the core 5, and for the purpose of securing each of theheads in position on the core an axial anchoring plug 11 is pressed out of a sheet metal disk 12 forming the head proper. Thus theplug 11 projects axially from the disk and in order that it may ed'ectuall engage with the annuvlar shoulder formed y the curl 8, the annular side Wall 13 of the plug is' circumferentially enlarged slightly at its inner terminus so as to form with the disk 12 an annular groove adapted to receive the curl 8.

lt will be observed that the enlar ed end 'of the plug il has a slightly roun ed terminating end portion of somewhat greater diameter than the internal. diameter of the curl 8, and in assembling'the head on the end of the core, it is necessary to exert sucient pressure to cause the plug to snap into interitting relation with the curl. ln this operation the rounded end portion of the plug 11 engages the rounded surface of the curl 8 with a cam-like action. Also the ends of the core yield slightly, this being facilitated by reasonof the fact that the meeting edges of the ends of the core are unconnected. At the same time, the tape when Wound upon the core provides a backing for the end porl.

tions of the core tending to maintain the inln the construction shown in F ig. t, a head ld is applied to one end onl of the core 5.` The manner ci securing the ead to the core is the same as in Fig. l, except that the inner wall of the plug is cut away, thus leaving a grooved ange la, but the peripheral edge of the bead is shaped to form a hooked.

ange l5 for engagement in one end of' a es cylindrical ,casing 18, the opposite end of which is closed by an end Wall 17. As shovvn, the inner end of the core does not in this 1n stance have a 4head applied thereto. The

'bead le, it will be observed, forms a cover` or closure for the open end of the casing, and to retain the spool Within the casing, the head 14 may be provided with an annular bead 16 projecting radially outwardly from the inner end of the flange 15 so as to engage with a snap fit. projections or indentations 19 in the casingnear the open end thereof.V

It will be observed that the construction rovided permits of the economical manuacture of adhesive plaster spools by rendering it possible to applyl the plaster to its tu ular core before applying the heads to the core, and at the saine time the head or heads, as the case may be, may be readily applied to the core and when appli'ed'are firmly retained in position thereon.

I claim as my invention:

1. A s ool comprising a tubular member formed rom a flat sheet of metal to provide a metallic core for a roll of adhesive plaster, said core having one endcurled inwardly to form an annular shoulder of substantially circular cross section, anda head com rising 'a disk having its central portion presse axially to form a circular anchoring plu ,the lperipheral wall of said plug being s aped to provide an annular groove adapted snugly to receive the inwardly curled end ortion of the core when the plug is force into the core.

2. A s ool comprising a tubular member formed rom a Hat sheet of metal to provide a metallic core for a roll ofadhesive tape orthe like, said core having one end curled inwardly to forni an annular rounded shoulder portion and a head adapted to be secured to said end of the core and comprising a disk of sheet metal having a central portion pressed axially to form an integral annulus, saidannulus being shaped t'oI provide an annular groove for receiving the inwardly curled end portion of the core when the head is forced onto the core axiallythereof.

3. A s ool comprising a tubular member formed m a/ ilat sheet of metal to provide a metallic core for a roll of adhesive tape or the like, the meeting edges of said sheet being unconnected at one end of the core to permit of circumferential expansion thereof, saidpend of the core having an inturned portion providing an annular shoulder, and a head having an annulus projectin axially therefrom having a terminating en portion of a fixed external diameter somewhat ater than the normal internal diameter o said inwardly turned end portion of the core, said head being adapted to be applied to the core by endwise pressure to force said annulusiast said ,inturned end portion and into hol' ing relation thereto.

'i 4. A s ool comprising a tubular member formed lfiiom a flat sheet of metal to provide ya metallic core for a roll ofadhesive tape or the like, one end of the core having an inturned portion providing a rounded annular shoulder, and a head having an annulus projecting axially therefrom having a rounded terminating end lportion of a fixed external diameter somewhat greater than the normal internal ydiameter of. said vinwardly turned end portion of the core, said head being adapt- Y member is forced endwise, onto the core.

16. A spool comprising a tubular metallic core havin at one end an inturned flange, and an en member having an axially pro-` jecting flange ooved to receive the fiange on the end mem r. when the latter lis forced endwise onto the core.

7. A Yspool comprising a tubular metallic core having at one end an inturned ange, and an end member having an axially proJecting flange grooved to receive snugly the iiange on the core when the end member is forced endwise onto the core, one of said anges being yieldable to permit the engagement of the two flanges.

8. An adhesive plaster spool comprising a tubular member formed from a Hat sheet of vmetal to provide a metallic core and having portion providing a shoulder, an a head cornpris'ing a flat circular plate and an annulus p roJecting axially therefrom ofan external diameter somewhat greater than the internal diametei` of said core at said shoulder, said head being adapted -to be applied to the core .by endwisepressure to force said annulus into engagement with said shoulder and position the head plate closely adjacent the end of said roll. v i

9; An adhesive plaster spool comprising a tubular member formed from a fiat sheet of metal to provide a metallic core and having thereon a roll of adhesive tape of a widthv` substantially equal to the width of said core, and a head comprising a flat plate and an annulus rigid therewith projecting axially therefrom, said annulus having an external diameter slightlyv greater than the internal diameter of the core at one end thereof, and said head being adapted to be applied to the core by endwise pressure to force said annulus into holding relation to said end of the core while positioning said head plate closely adjacent the end o said roll.

. In testimony whereof, I have hereunto 'affixed my signature. f

JOHN H. KJ ELLSTROM. 

